Transformation process for production of ultrahigh carbon steels and new alloys
Abstract
Ultrahigh carbon steels with superplastic properties are produced by heating a steel containing ferrite and carbide phases to a soaking temperature approximately 50 C above the A{sub 1} transformation temperature, soaking the steel above the A{sub 1} temperature for a sufficient time that the major portion of the carbides dissolve into the austenite matrix, and then cooling the steel in a controlled manner within predetermined limits of cooling rate or transformation temperature, to obtain a steel having substantially spheroidal carbides. New alloy compositions contain aluminum and solute additions which promote the formation of a fine grain size and improve the resistance of the carbides to coarsening at the forming temperature. 9 figs.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of California (United States)
- OSTI Identifier:
- 100986
- Patent Number(s):
- 5445685
- Application Number:
- PAN: 8-034,430
- Assignee:
- Univ. of California, Oakland, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 29 Aug 1995
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; CARBON STEELS; FABRICATION; PLASTICITY; PHASE STUDIES; MICROSTRUCTURE; TRANSITION TEMPERATURE
Citation Formats
Strum, M J, Goldberg, A, Sherby, O D, and Landingham, R L. Transformation process for production of ultrahigh carbon steels and new alloys. United States: N. p., 1995.
Web.
Strum, M J, Goldberg, A, Sherby, O D, & Landingham, R L. Transformation process for production of ultrahigh carbon steels and new alloys. United States.
Strum, M J, Goldberg, A, Sherby, O D, and Landingham, R L. Tue .
"Transformation process for production of ultrahigh carbon steels and new alloys". United States.
@article{osti_100986,
title = {Transformation process for production of ultrahigh carbon steels and new alloys},
author = {Strum, M J and Goldberg, A and Sherby, O D and Landingham, R L},
abstractNote = {Ultrahigh carbon steels with superplastic properties are produced by heating a steel containing ferrite and carbide phases to a soaking temperature approximately 50 C above the A{sub 1} transformation temperature, soaking the steel above the A{sub 1} temperature for a sufficient time that the major portion of the carbides dissolve into the austenite matrix, and then cooling the steel in a controlled manner within predetermined limits of cooling rate or transformation temperature, to obtain a steel having substantially spheroidal carbides. New alloy compositions contain aluminum and solute additions which promote the formation of a fine grain size and improve the resistance of the carbides to coarsening at the forming temperature. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 29 00:00:00 EDT 1995},
month = {Tue Aug 29 00:00:00 EDT 1995}
}